Apparatus for cutting and heading rivets



Jail. 22, 1924.

A. HECK APPARATUS FOR CUTTING AND HEADING RIVETS Filed May 15 1921 2 Sheets-Sheet 1 Jan. 22, 1924.

A. HECK APPARATUS. FOR CUTTING AND HEADING RIVETS Filed May 13 1921 2 Sheets-Sheet 2 w wg Patented Jan. 22, 1924.

UNETED STATES AUGUSTUS HECK, 0F CAMBRIDGE, MASSACHUSETTS.

APPARATUS FOR CUTTING AND HEADING RIVETS.

Application filed May 13, 1921. Serial No. 469,142.

To all whom it may concern Be it known that I, AUGUSTUS HncK, a

citizen ofthe United States, and resident of Cambridge, county of MiddleseX, Commonwealth of Massachusetts, have invented an Improvement in Apparatus for Cutting and Heading. Rivets, of which the following de scription, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts in each of the several views.

This invention relates to apparatus for cutting off and heading rivets and more particularly to improvements in a machine of the type shown in my prior application, Serial No. 407,167. A principal object of the present invention is to make the, apparatus more conveniently and better adaptable and adjustable to all kinds and conditions of work and to the different kinds and thicknesses of material in which the rivets are to be applied and headed, such materials including different thicknesses of leather or like flexible material, as well as different thicknesses of metal. A further object is to provide an improved mounting and arrangement of the operating parts whereby these are more strongly and securely held for their operative functions and under all conditions. A still further object is to provide an improved adjustable mounting and setting of the rivet cutting-off elements, and whereby these elements are renewable and replaceable. The foregoing and other objects and advantages of the invention will more fully appear from the following detailed description taken in connection with the accompanying drawings, and the dis-- tinctive features of novelty will be pointed out inthe appended claims.

Referring to the drawings:

Fig. 1 is a side elevation ofa machine embodying the invention, a portion thereof being broken away in vertical section;

Fig. 2 is an inner or rear view of the cutting-off head on a larger scale;

Fig. 3 is a detail transverse section on line 3-3 of Fig. 2;

Fig. 4 is a plan view of the machine;

Fig. 5 is a partial sectional view on line 55 of Fig. 4; p

. Fig. 6 is a detail vertical section on line 6-6 of Fig. 2; and

Fig. 7 is a sectional detail on line 77 of Fig. 1.

10 indicates a supporting framework and housing equipped with an upright column 10 on which are supported the operative instrumentalities of the machine. In the lower front portion of the framework a bar 11 is fitted to slide vertically, this bar bearing at its upperportion a shelf 12 in the outer portion of which is removably fitted an anvil 13. The anvil 13 may be held in place by means of a depending stem 13 thereof fitting into a socket in the shelf 12 and this anvil element will in practice be selected according to the kind of work in handand applied to the shelf 12. The bar 11 is equipped with a. post 14 projecting upwardly with an adjusting screw 15 set thereinto and this post fitting into a socket 16 of the framework to support and steady the bar 11 which with its bracket shelf 12 constitutes the work support of the machine, such support-being available when the anvil is moved upward to its operative position when the post 14 fitsinto the socket 16. The head of the screw 15 engaging the inner end 16 of the socket 16 adjustably limits the upward movement of the work support so that this .can be accurately determined with reference to the tools to be described, for

any particular work. The screw 15 is locked in adjusted position by a lock-nut 15 The lower portion of the bar 11 is equipped with a rack formation 11? engaged by a pinion 17 journalled in the framework, this pinion being engaged at its other side by a rack bar 18 slidably guided in the framework and.

having a connection 19 to a treadle or like operating means (not shown). The bracket shelf 12 is equipped with a tongue 12 at its inner end which fits in a way 20 at the front of the housing, this serving to further guide and steady the work support. At the top and front of the housing column 10 is fixed a forwardly extending holder member com prising two curved cheek pieces 21, 22 to" gether forming a clamp holder for a cylindrical block 23 which is fitted therein for angular adjustment about a vertical axis. The cheek members 21, 22 are equipped with mating pairs of lugs 21, 22 through which are passed clamp bolts 24 by means of which the block 23 may be securely clamped in idler pulleys 32 and adjusted position. The block 23 is held from vertical displacement by a. flange 23 at its lower end engagingthe bottom of the cheeks 21, 22 and by a clip plate 25 secured to its top by means of a clamp bolt 26 and engaging the top of the clamp cheeks. The block 23 has journa-lled vertically therein and axially thereof a shaft 27, as shown by means of ball-bearings 28, the lower one of which is formed as a thrust bearing toreceive the upward thrusts of the spinning tool 29 borne by the shaftf2T. This spinning tool 29 is detachably threaded into the lower end of the'sh'aft'27 as indicated at 29% being thus instantly removable and replaceable for difierent'kinds of work;

Driving impulse may be imparted to the shaft 27iin any suitable manner; but as shown I fix a belt pulley 30 to a projecting upper end thereof "which is engaged by a belt -3l"which passes around intermediate is engaged with a pulley 33"mounted on a shaft34 borne by the framework and actuated by a prime drive pulley The spinning tool 29'being thus mounted'as described in the axis of adjust In'entof the head 23 is unalfected by the angular adjustment of the head 23 and is at all times opposite the'anvil 13. The head 23 be cored at all intervals as indicated at 23} forthe sake of lightness and saving of metal. The -head'23 has'a vertical bore 36 therethrough atone side thereof in which is slidably fitted the upper end of a stout rod or 'bar'37. This bar is held within limits as to its endwise sliding movement and also against turning angul arly by means of a short pin 38 projecting transversely there-.

from and fitting in an elongated slot 39 in the adjacent portion of the block 28. The bar 37'is normally held yieldingly at its downward or'outer limit of movement by means of a compression coil spring 40 housed in the upper portion of the bore 36 and-reacting against a plug 41 threaded in the outer end of said bore. 'The'bar 37 has fittedtransversely through a bore at the lower end thereof, a stout bolt 42 and it has also fitted on its lower enda block 43 bored to receive the same and having an inward extension 44 at its bottom. The bolt 42 extends through a passage therefor in this block and its extension 44 and its outer threaded extremity also passes through a slot 45 in an upturned extension 45 at the back of a shoe 45 which is by means of a nut 46 on the bolt 42 thus clamped securely to the end portion of the bar 37 in adjusted position as permitted by the adjustment of the'bolt 42 with respect to the slot 45 The bolt 42isformed with an enlarged portion 42 adjacent shoulder 47 adapted to bear against the block extension 44 as the nut 46. is drawn up to clamp the shoe 45 in place. Theenits head 42 constituting a;

larged bolt portion 42 constitutes a pivot bearing for two cutter bearing lever arms 48, 49 which are relatively rebated as indicated at adjacent the pivot so that they operate in the same plane. These arms are equipped at their lower port-ions with outwardly extending blocks 48, 49 having undercut slots 50 in their inner faces in which are fitted correspondingly undercut tongues 51 formed at the back of the shank portions of cutters 52. These cutters are secured in place screw bolts 53 so that their operative edges are mounted for co-operation a very small distance above the bottom of the shoe 45 which has a forwardly projecting portion extending into the plane of these cutter-sand cut away as indicated at 54 to afford clearance therefor. The distance between the bottom of the shoe 45 and the operative edges of the cutters 52 may thus be regulated by loosening the nut 46 and adjusting the shoe 45, and this adjustment determines the extent to whi h the rivet as cut oil by the device will project above the material to be spun down as a head by the i spinning tool 29. Each of the cutter arms 48, 49 has pivoted to an upper portion thereof at 55 a short upwardly extending bar 56 bearing at its upper end a transversely extending pin 57 engaging in a cam slot 53 formed in the face of a bracket bar 59 fixed to and depending from, the bottom of the block 23. The upper portions of the bars 56., and hence the pins 57 borne thereby are adjustable with respect tothe cutter arms 48,- 49, the cutter arms having slots 60 through which pass pins 61 set/into the bars 56 whereby said bars maybe adjustably fixed with reference to the cutter arms. Backing screws 62 are also provided set through the'upper ends o'fthe cutter arms and engaging againstthe outer portions of the bars 56 directly opposite the pins 57. The adjustment thus provided of the bars 56 with respect to the cutter arms provides means whereby the cutters 52 may be set closely and accurately for co-operation in severing the rivets and permits any necessary take-up for wear. In use, the material with the rivet placed therein is applied withthe rivet upon the anvil 13. Then upon the operation ofthe treadle the work support bearing the anvil with the material is raised until the upper surface of the material engages the bottom of the shoe 45. At this time the post 14 has entered the socket 16 so that the work support is strongly and securely supported from above as well as from beneath. A further upper movement of the work support presses the shoe 45 with the bar 37 upward against the spring 36. This movement causes the pins 57 operating in the cam grooves 58 to move the cutters 52 together, it being noted that at the beginning 01" the operation these cut- I less the shoe and cutters project inward as ters are spaced apart as shown in 2 so that the end of the rivet may be passed therebetween. Thus the rivet is severed and by a further upward movement of the parts, the pins 57 operating in the converging upper portions 58 of the cam grooves 58 again separate the cutters 52 permitting the spinning tool 29 to engagethe rivet end on the final upward movement oflthe material, spinning the end of the rivet into a head against the material; by gauging the distance of the bottom of the shoe 4:5 with respect to the cutters 52, the rivet may be severed so as to leave just the right amount of projection for spinning down into the head. By adjusting the block 23 angularly as described, the shoe 4:5 with the cutters 52 may be set so as to extend inwardly as shown, or outwardly or at any intermediate angle as may be most convenient for different classes of work. I attach large importance to this feature, since for certain classes of Work it is almost impossible or very inconvenient to apply the material in operative position unshown, while with other classes or work it is much more convenient to have the shoe and cutters projecting outward with respect to the machine housing. I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention. 7

Having described my invention, what I claim as new and desire to secure by Letters Patent is: r

1. Apparatus of the kind described comprising a material support, and mechanism co-operative therewith for first cutting off rivets and then heading the same, said mechanism consisting in a. heading device, and a cutting-oil device mounted for adjustment to difi'erent positions with respect to the heading device.

2. Apparatus of the kind described comprising a material support, and mechanism co-operative therewith for first cutting off rivets and then heading them, said mechanism consisting in a heading tool, and a cutting-oil device mounted for angular adjustment to different positions with respect to said material support.

3. Apparatus oi' the kind described comprising a material support, a rivet heading device. and means for cutting off the rivets preliminary to the heading thereof mounted for angular adjustment to any direction with respect to a rivet on said material support.

i. Apparatus of the kind described comprising a device for heading rivets, a material support mounted formovement toward and from said heading device, and rivet cutting-off means constructed and arranged for actuation by engagement with the material on said support and mounted for adjustment to diiierent angular positions with respect to said support.

5. Apparatus of the kind describedcomprising rivet head spinning device, a material support mounted for movement toward and from the same, and rivet cutting-oft means constructed and arranged for actuation by said material support and mounted for angular adjustment to any position around said spinning device as an axis.

6. Apparatus of the kind described comprising a rivet heading device, means for preliminarily cutting off the rivets prior to the heading thereof, a material support mounted for movement toward and from said cutting-off and heading means, and means engaging said supportboth above and below the same when in operative position to steady the same.

7. Apparatus of the kind described comprising a rivet heading device, rivet cuttingoif means, a material support mounted for movement with respect to said heading device and cutting-oi"? means, and means for adjustably limiting such movement.

8. Apparatus ot' the kind described comprising a rivet header, means for cutting ofi the rivets preliminary to the heading thereof, a work support mounted for movement toward and from said cutting-off means, and means variable at will according to the material required for the rivet head for causing said cutting-oii means to sever the rivet with a projection above the material.

9. Apparatus of the kind described comprising a rivet header, a work support mounted for movement toward and from the same, a rivet cutting-off device constructed and arranged for actuation by engagement with the material on said support, said device equipped with a material engaging shoe mounted for adjustment with reference to the rivet header and permittin the rivet to be severed with a projection rom the material variable at will to leave material for the required rivet head.

10. Apparatus of the kind described comprising a rivet header, a material support mounted for movement toward and from the same, and rivet cutting-off means arranged for actuation by engagement with the material on said support and equipped with means for adjustment of its cutting elements to take up for wear.

11. Apparatus of the kind described comprising a work support, a rivet header, rivet cutting-off means mounted for movement and actuation by engagement with the material on said support. a relatively stationary cam engaging said cutting-off means,

with the material on said support and equipped with removable and rep-laeeable 10 cuttil i'g elements engaging the rivet at 'p} pesitesides thereof.

Intestimonywhereof, I have signed my name to this speeifi eation.

AUGUSTUS HECK- 

